Putting Opponents onto a "Range" of Hands

[Pedigree]

UTG is new to the table but through about 20 hands seemed pretty lose. SB is pretty loose and unsophisticated ... plays very straightforward. BB is a calling station.

Party Poker 2/4 Hold'em (10 handed) converter

Preflop: Hero is CO with A[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/spade.gif[/img].
<font color="#CC3333">UTG raises</font>, <font color="#666666">5 folds</font>, Hero calls, <font color="#666666">1 fold</font>, SB calls, BB calls.

Flop: (8 SB) T[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, BB checks, <font color="#CC3333">UTG bets</font>, <font color="#CC3333">Hero raises</font>, SB folds, BB folds, UTG calls.

Turn: (6 BB) 2[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
UTG checks, <font color="#CC3333">Hero bets</font>, <font color="#CC3333">UTG raises</font>, Hero calls.

River: (10 BB) 2[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">UTG bets $1.5 (All-In)</font>, Hero calls.

Final Pot: 11.50 BB

I'm fairly good at putting an opponent onto a specific hand after the hand is done and before the showdown but I'm terrible at putting an opponent onto a range of hands based on his preflop play.

How do you think that hurt my decision making here? Both WLLHE and SSHE say my preflop call was correct. I probably would've called the flop instead of raising if I didn't want to knock the blinds out. Should I have backed off or folded on the turn? Advice is appreciated!